I prefer the Bisley to the plow handle (any iteration of the plow handle). I have Bisley grip frames on my hardest kicking big bores and IMO, they would be uncontrollable without the Bisley grip.
Most of the reputable custom gunsmiths will automatically change the grip frame on their conversions to the bigger calibers -- like the .475 and .500 Linebaughs. In fact, Hamilton Bowen won't even build a .475 or .500 L without putting a Bisley grip frame on the revolver.
